Management method for two-stage route table in data communication equipment

A technology of data communication and management method, which is applied in the field of hardware multi-level routing table management, to achieve a reasonable and efficient effect of the system

A technology of data communication and management method, which is applied in the field of hardware multi-level routing table management, to achieve a reasonable and efficient effect of the system

CN1812377AInactive Publication Date: 2006-08-02HUAWEI TECH CO LTD
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  • Management method for two-stage route table in data communication equipment
  • Management method for two-stage route table in data communication equipment
  • Management method for two-stage route table in data communication equipment

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Experimental program
Comparison scheme
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Embodiment Construction

[0023] In the two-level routing table environment, the default route of 0.0.0.0 / 0 is set on the first-level chip, and the next-hop port of the route is specified as being on the second-level chip, so that the message is forwarded to the second chip for further processing . Packets whose destination address cannot find a route will eventually match the default route, so routing processing can continue to be completed on the second-level chip.

[0024] Because routing and forwarding will modify the TTL and source virtual network identifier in the packet. Therefore, the forwarding behavior through the default route should be transparent transmission, and the packet will be forwarded according to the specified port, and the header information of the packet will not be changed.

[0025] For the control software, it is necessary to modify the logic of routing distribution according to a certain strategy. The routing table needs to be maintained and managed on both chips, but the fi...

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Abstract

This invention provides a kind of management method for two-level routing conversion table in data transmission device. It concludes: the first-level chip and second-level chip set up cascade; the message carries out routing finding in the first-level chip firstly. If it does not find out matched route in the first chip, the message will be sent to second-level chip through default route. This method can organize the two-level routing list into a reasonable structure.

Description

technical field [0001] The invention belongs to the field of IP data communication, and in particular relates to a management method of a hardware multilevel routing table in an IP data network device. Background technique [0002] In IP data communication equipment, routing forwarding is completed by hardware chips, and the control software running on the control CPU is responsible for the organization and management of hardware routing tables, such as: routing insertion, routing deletion, routing update, etc. [0003] The hardware chip has a storage space for storing routing table entries, and the chip searches its own routing table according to the destination IP address of the received message to complete the routing forwarding process. However, if the routing and forwarding entry space of the chip is limited, the number of routing entries that can be saved is relatively low, which cannot meet the requirement for a high number of routing entries in large-scale network ap...

Claims

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Application Information

Patent Timeline
02 Aug 2006
Publication
CN1812377A
IPC
H04L12/56; H04L12/705
Inventors
郑炎